Sound-producing mechanism.



Qwi/Mw-mw @{zm @5 /M77 PATENTED JAN. 21, 1908.

0. P. GRAHAM. SOUND PRODUCING MECHANISM;

APPLICATION FILED SEPT.25.1905.

of those types wherein diaphragms are emproducer, showing the improved diaphragm nipple Ghas a centrally arranged triangular NITED STATES PATENro FICE.

CHARLES l. GRAHAM, OF NEAR SELLERSBURG, INDIANA.

SOUND-PRODUCING ME CHANISM.

To all whom it may concern:

B it known that I, Cuiuuias F. GRAHAM, a citizen of the United States, residing at near Sellcrsburg, in the county of Clark and State of Indiana, have invented a new and useful Sound-Producing Mechanism, of which the following is a specification.

The present invention relates more particularly to dia' hragms for sound-producing machines and y the term soundroducing machines, it is intended to inc ude all ployed'for recording sounds or reproducing sounds already recorded. The principal object is to provide a simple device that will accurately produce and record sounds with clearness and without harsh or mechanical resonance, will permit the ready attachment thereto f the actuating or recording means without the necessity of any additional adany desirable shape.

he preferred embodiment of the invention is illustrated in the accompanying drawings, wherein:

' Figure 1 is a sectional view through a rein 1ace.- Fig. 2 is a perspective view of sai diaphra m.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, a reproducer box is empioyed, comprising threaded telescoped sections 3 and 4, that clamp between them a diaphragm 5, and a sound; conducting nipple 6, to which the usual tube may be attached." The diaphragm is preferably in the form of a disk that is made of gelatin or-other similar mucilaginous 1na-' teriali The side that is disposed toward the flat sided projection 7, also formed of gelatin and attached thereto by the adhesive qualities of the material. I

Carried by the boxing is the usual reproducing device, which, in the present embodiment comprises a lever 8 pivoted between its ends on a swinging support 9, one end of said lever having a stylus 10,the other'heing connected by a link 1].- to a post 12. The post Specification of Letters Patent.

Application filed September 25. 1905. Serial No. 279.954.

I Patented Jan. 21, 1908.

12 is fastened to the central portion of the face of the diaphragm disk opposite to that carrying the projection 7, and the holding means employed is merely the adhesive properties of the gelatin. In other words, all that is necessary to attach the post is tp moisten the gelatin and apply said post.

The gelatin soon drying, securely holds said l post in place.

Experience has demonstrated. that by means of this dia hragm, tones are produced that are asl'ou as the diaphragms ordinarily employed and that harsh and me-.

chanical sounds are eliminated. The tones, moreover, are melodious and natural aswell as clear and distinct. Furthermore, it is very easy to attach the partsto the diaphragm, as there is no necessity to employ extraneous adhesives;

From the foregoing it is thought that the construction, operation, and rnanyadvantages of the herein described invention will be a parent to those skilled in the art, without iurther description, and it will be under.- stood that various changes in the size, shape, proportion, and minor details of construction maybe resorted to without departing from the spirit or sacrificing any of the advantages o the invention.

Having thus I claim as new and desireto secure by Letters Patent, is:

1. In sound-producing mechanism, a diaphragm com using a gelatiniform plate, and a centrally isposed gelatiniforrn projection having a surface engagement with one face of the plate, and secured thereto by the adhesive roperties'of the material comprising the p ate and projection. 1

described my invention whatf 2, In sound-producing mechanism, .a dia- 'phragm comprising a disk composed of gelatin, a centrally dis osed triangular projection' carried by one ace of the dislnand a reproducing device having a connection with the other face of'the disk.

3. In sound-producing mechanism, a diaphragm comprising a gelatiniform plate, and a reproducing devicehaving a surface connected With the diaphragm by the adhesive propertieso the same;

4. in sound-producing mechanism, a diatin, a centrally dis osed triangular projecmy own, I have hereto affixed my signature tion carried by one ace of the disk, and a rein the presence of two Witnesses. producing device including a post having a CHARLES F. GRAHAM. -5 surface connection with the diaphragm by Witnesses:

the adhesive properties of the gelatin com- EDWARD G. HENRY posing the same. JonN K. GRAHAM.

hra in com 7 rising a disk com nosed of ela- In testimon that I claim the foregoing as P g P 1 n 

